Double-station exchange workbench

Abstract

The invention relates to a double-station exchange worktable, which belongs to the technical field of numerical control machine tools and comprises an exchange plate, a fixed frame, a power mechanism, a lifting assembly and a rotating assembly, a feeding table and a discharging table are fixed on the exchange plate at intervals, and the fixed frame, the power mechanism, the lifting assembly and the rotating assembly are arranged below the exchange plate and correspond to the position between the feeding table and the discharging table. The power mechanism is fixed to the fixing frame and provided with an output shaft A and an output shaft B which are both perpendicular to the exchange plate. The lifting assembly is in transmission connection with the output shaft A, and the rotating assembly is in transmission connection with the output shaft B. A cam of the lifting assembly and an intermittent gear C of the rotating assembly are fixedly arranged on an output shaft A and an output shaft B of the power mechanism in a sleeving mode correspondingly, the exchange plate can be periodically and intermittently lifted and periodically and intermittently rotated, the exchange plate is alternately pushed to ascend, descend and rotate, and the actions of lifting, rotating and falling are continuously achieved; position exchange of the feeding table and the discharging table is completed, the structure of the double-station exchange workbench is simplified, the feeding and discharging time is saved, and the machining efficiency of a machine tool is improved.

Description

Technical Field

[0001] The invention relates to the technical field of numerically controlled machine tools, in particular to a double-station exchange workbench. Background Art

[0002] With the rapid development of modern manufacturing technology, in order to improve processing efficiency, an exchange table for reducing clamping time has emerged. The double-station exchange workbench is an important component to ensure the continuous operation of the equipment. The exchange workbench is generally divided into three parts: the exchange mechanism, the equipment processing CNC turntable, and the manual clamping loading table. The exchange mechanism can rotate 180° under system control to realize the automatic exchange of the two pallets of the CNC turntable part and the manual loading table part, achieving a very high exchange accuracy, so that the clamping of the workpiece to be processed, the unloading of the finished product and the machining can be carried out simultaneously, which greatly saves auxiliary time and improves the processing efficiency of the machine tool.

[0003] The action flow of the double-station exchange workbench is "lift - rotate - drop", but the current mechanism rotation and lifting and lowering are driven by two sets of mechanisms. For example, the patent number is 201710898869.6, and the patent name is an invention patent for a double-station exchange workbench. In this patent, rotation mainly adopts gear racks, worm gears and other mechanisms, and lifting and lowering are mainly driven by hydraulic cylinders. Although the precision is high, the structure is complex and the structure volume is large; at the same time, the current exchange mechanisms do not support wiring, air pipes or oil pipes, and the workpieces are clamped by manual clamps, and automatic clamps cannot be used, which greatly increases the difficulty of clamping.

[0004] Therefore, how to design a double-station exchange workbench with a simple structure, compact size and capable of continuously completing the "lifting-rotating-dropping" action with only a single power source is a problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] The invention provides a double-station exchange workbench, which solves the technical problem that the existing double-station exchange workbench has an overly complex structure.

[0006] The technical solution of the present invention to solve the above technical problems is as follows: a double-station exchange workbench, comprising: an exchange plate, on which a loading platform and a unloading platform are fixed at intervals, and further comprising: a fixed frame, a power mechanism, a lifting assembly and a rotating assembly arranged below the exchange plate and corresponding to between the loading platform and the unloading platform,

[0007] The power mechanism is fixed on the fixing frame and has an output shaft A and an output shaft B perpendicular to the exchange plate;

[0008] The lifting assembly includes a piston rod, a cam and a moving part, the top end of the piston rod is fixed to the bottom surface of the exchange plate; the cam sleeve is fixed on the output shaft A; the moving part is placed on the fixed frame and its top surface is an inclined surface that is inclined upward in sequence from the direction away from the cam to the direction close to the cam, and its inclined surface is in sliding contact with the bottom end of the piston rod, and its side surface is in sliding contact with the outer wheel surface of the cam, so as to push the moving part to slide back and forth periodically and intermittently, so as to realize the periodic intermittent lifting and lowering of the exchange plate;

[0009] The rotating assembly includes a rotating shaft, an intermittent gear C and an intermittent gear D. The rotating shaft is arranged at intervals from the piston rod and its top end is fixed to the bottom surface of the exchange plate; the intermittent gear C is sleeved on the output shaft B; the intermittent gear D is sleeved on the rotating shaft and meshed with the intermittent gear C to push the exchange plate to rotate when the exchange plate is intermittently raised or lowered, thereby realizing periodic intermittent rotation of the exchange plate.

[0010] The beneficial effects of the present invention are as follows: by using the cam of the lifting assembly and the intermittent gear C of the rotating assembly to be respectively fixed on the output shaft A and the output shaft B of a power mechanism, the exchange plate can be periodically and intermittently lifted and periodically and intermittently rotated, and the exchange plate can be alternately pushed to lift and rotate, and the "lifting-rotating-falling" action can be continuously realized to complete the position interchange of the loading table and the unloading table, simplify the structure of the double-station exchange workbench, save loading and unloading time, and improve the machining efficiency of the machine tool.

[0011] Description of the lifting action principle of the double-station exchange workbench:

[0012] The side surface and top surface of the moving part are respectively in sliding contact with the outer wheel surface of the cam and the bottom end of the piston rod. Since the top surface of the moving part is arranged upwardly tilted from away from the cam to close to the cam, when the cam (the cam is an existing structure, and its outer wheel surface includes an outer convex arc surface and an inner concave arc surface) rotates, ① the inner concave arc surface of one part of the cam will push the moving part to slide in the direction away from the cam, and push the piston rod upward, ② the outer convex arc surface of the cam will maintain the moving part in the predetermined position for a period of time (at the same time the piston rod is in the highest position), ③ the inner concave arc surface of the other part of the cam loses the driving force on the moving part. At this time, the piston rod also loses the driving force to rise. Under the influence of the pressure of the exchange plate, the loading and unloading platforms and its own gravity, the moving part will be pushed to slide in the direction close to the cam to restore the initial position of the moving part. This cycle is repeated to realize the periodic intermittent reciprocating movement of the moving part and complete the periodic intermittent upgrading of the exchange plate.

[0013] Description of the rotation principle of the double-station exchange workbench:

[0014] First, the intermittent gear C (in the existing structure, the intermittent gear is also called an incomplete gear, and there are only a few teeth on its outer circumferential wall) is fixed on the output shaft B, and then the intermittent gear D (in the existing structure, the intermittent gear is also called an incomplete gear, and there are only a few teeth on its outer circumferential wall) is sleeved on the rotating shaft. Since the intermittent gear D is meshed and connected with the intermittent gear C, the rotating shaft can be driven to rotate when the exchange plate is raised and lowered, thereby realizing the periodic intermittent rotation of the rotating shaft. Since the top end of the rotating shaft is fixed to the bottom surface of the exchange plate, the periodic intermittent rotation of the exchange plate can be synchronously completed.

[0015] Based on the above technical solution, the present invention can also be improved as follows.

[0016] Furthermore, the exchange plate includes a support plate and a turntable, and the loading platform and the unloading platform are fixed on the support plate at intervals; the turntable is located between the loading platform and the unloading platform and its top surface is fixed to the bottom surface of the support plate; the fixed frame, the power mechanism, the lifting assembly and the rotating assembly are all located below the turntable; the top end of the piston rod and the top end of the rotating shaft are fixed on the bottom surface of the turntable at intervals.

[0017] Furthermore, the power mechanism includes a motor and a dual-output shaft reducer, the motor and the dual-output shaft reducer are both fixed on the fixed frame and the output shaft of the motor is drivingly connected to the input shaft of the dual-output shaft reducer; the output shaft A and the output shaft B are the two output shafts of the dual-output shaft reducer.

[0018] Furthermore, the lifting assembly also includes a rotating wheel E and a rotating wheel F, wherein the rotating wheel E is rotatably connected to the side of the movable member corresponding to the cam and its outer wheel surface is rollingly connected to the outer wheel surface of the cam; the rotating wheel F is rotatably connected to the bottom end of the piston rod and rolls on the top surface of the movable member.

[0019] The further beneficial effect of adopting the above method is: first, the rotating wheel E is rotated on the side of the moving part and is rollingly connected with the outer wheel surface, and then the rotating wheel F is rotated and connected to the bottom end of the piston rod and contacts the moving part of the moving part, which can reduce the friction between the moving part and the cam and the piston rod, and improve the smoothness of the periodic intermittent reciprocating sliding of the moving part.

[0020] Furthermore, it also includes a slide rail and a slider, wherein the slide rail is arranged along the sliding direction of the movable member and is fixed on the fixing frame; and the slider slides on the slide rail and is fixed on the movable member.

[0021] A further beneficial effect of the above method is that the sliding block is fixed on the moving part and slides on the slide rail, so as to guide the sliding direction of the moving part and improve the stability of the periodic intermittent lifting and lowering of the exchange plate.

[0022] Furthermore, the lifting assembly also includes a return spring, which is arranged along the sliding direction of the movable member and has one end fixed to the fixing frame and the other end fixed to the movable member.

[0023] The above method has the following further beneficial effects: the two ends of the return spring are respectively fixed on the fixed frame and the movable member. Since the return spring is arranged along the sliding direction of the movable member, after the cam loses the power to push the movable member, it can assist in pulling the movable member toward the cam to restore the initial position of the movable member.

[0024] Furthermore, the piston rod, the rotating wheel F, the slide rail, the slider and the return spring are all arranged in pairs.

[0025] Furthermore, the rotating assembly also includes a plurality of splines, the intermittent gear C rotates on the fixed frame and the wall of its shaft hole is provided with a plurality of spline grooves distributed along the circumferential direction, the plurality of spline grooves are arranged axially of the rotating shaft and pass through the top and bottom ends of the intermittent gear C; the plurality of splines are fixed on the outer circumferential wall of the rotating shaft at intervals along the circumferential direction and slide in the plurality of sliding grooves respectively, so as to keep the position of the intermittent gear C unchanged after the rotating shaft moves upward with the exchange plate, and maintain the transmission relationship between the rotating shaft and the intermittent gear C.

[0026] A further beneficial effect of the above method is that by utilizing multiple splines on multiple rotating shafts to slide in multiple spline grooves on the wall of the shaft hole of the intermittent gear C, the position of the intermittent gear C can be kept unchanged after the exchange plate rises, thereby maintaining the transmission relationship between the rotating shaft and the intermittent gear C.

[0027] Furthermore, a wire tube laying hole is provided on the exchange plate, the rotating shaft is a hollow shaft, and the wire tube laying hole is arranged opposite to the inner hole of the rotating shaft.

[0028] A further beneficial effect of adopting the above method is: laying oil pipes or wire pipes in the wire pipe laying holes of the rotating shaft can provide electrical energy or hydraulic kinetic energy for the clamps on the loading or unloading table, reduce manual labor intensity, and improve the level of automation of workpiece clamping on the loading or unloading table. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a front perspective structural diagram of a double-station exchange workbench of the present invention;

[0030] Figure 2 It is a rear-view stereoscopic structural schematic diagram of a double-station exchange workbench of the present invention;

[0031] Figure 3 It is a right-side stereoscopic structural schematic diagram of a fixed frame, a power mechanism, a lifting assembly and a rotating assembly in a double-station exchange workbench of the present invention;

[0032] Figure 4 It is a left-side stereoscopic structural schematic diagram of a fixed frame, a power mechanism, a lifting assembly and a rotating assembly in a double-station exchange workbench of the present invention;

[0033] Figure 5 It is a right-side stereoscopic structural schematic diagram of a power mechanism, a lifting assembly and a rotating assembly in a double-station exchange workbench of the present invention;

[0034] Figure 6 It is a three-dimensional structural schematic diagram of a cam and a rotating wheel E in a double-station exchange workbench of the present invention.

[0035] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0036] 1. Exchange plate, 11. Support plate, 12. Turntable, 13. Wire pipe laying hole, 2. Fixed frame, 3. Power mechanism, 31. Motor, 32. Double output shaft reducer, 4. Lifting assembly, 41. Piston rod, 42. Cam, 43. Moving part, 44. Turntable E, 45. Turntable F, 46. Slide rail, 47. Slider, 48. Reset spring, 5. Rotating assembly, 51. Rotating shaft, 52. Intermittent gear C, 53. Intermittent gear D, 54. Spline, 6. Loading table, 7. Unloading table. DETAILED DESCRIPTION

[0037] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0038] like Figure 1 , Figure 2 and Figure 3 As shown, the double-station exchange workbench comprises: an exchange plate 1, on which a loading platform 6 and a unloading platform 7 are fixed at intervals, and further comprises: a fixed frame 2 arranged below the exchange plate 1 and corresponding to the loading platform 6 and the unloading platform 7, a power mechanism 3, a lifting assembly 4 and a rotating assembly 5,

[0039] The power mechanism 3 is fixed on the fixed frame 2 and has an output shaft A and an output shaft B of a 00000000000 vertical exchange plate 1;

[0040] The lifting assembly 4 includes a piston rod 41, a cam 42 and a moving member 43. The top end of the piston rod 41 is fixed to the bottom surface of the exchange plate 1; the cam 42 is sleeved on the output shaft A; the moving member 43 is placed on the fixed frame 2 and its top surface is an inclined surface that is inclined upward in sequence from the direction away from the cam 42 to the direction close to the cam 42. Its inclined surface is in sliding contact with the bottom end of the piston rod 41, and its side surface is in sliding contact with the outer wheel surface of the cam 42, so as to push the moving member 43 to slide back and forth periodically and intermittently, so as to realize the periodic intermittent lifting and lowering of the exchange plate 1.

[0041] The rotating assembly 5 includes a rotating shaft 51, an intermittent gear C52 and an intermittent gear D53. The rotating shaft 51 is arranged at an interval with the piston rod 41 and its top end is fixed to the bottom surface of the exchange plate 1; the intermittent gear C52 is sleeved on the output shaft B; the intermittent gear D53 is sleeved on the rotating shaft 51 and meshed with the intermittent gear C52 to push the exchange plate 1 to rotate when the exchange plate 1 is intermittently raised or lowered, thereby realizing the periodic intermittent rotation of the exchange plate 1.

[0042] like Figure 2 As shown, in some specific embodiments, the exchange plate 1 may include a support plate 11 and a turntable 12, and the loading platform 6 and the unloading platform 7 are fixed on the support plate 11 at intervals; the turntable 12 is located between the loading platform 6 and the unloading platform 7 and its top surface is fixed on the bottom surface of the support plate 11; the fixed frame 2, the power mechanism 3, the lifting assembly 4 and the rotating assembly 5 are all located below the turntable 12; the top end of the piston rod 41 and the top end of the rotating shaft 51 are fixed on the bottom surface of the turntable 12 at intervals.

[0043] like Figure 3 As shown, in some specific embodiments, the power mechanism 3 may include a motor 31 and a dual output shaft reducer 32, both of which are fixed on the fixed frame 2 and the output shaft of the motor 31 is drivingly connected to the input shaft of the dual output shaft reducer 32; the output shaft A and the output shaft B are the two output shafts of the dual output shaft reducer 32.

[0044] like Figure 5 As shown, in some specific embodiments, the lifting assembly 4 may further include a rotating wheel E44 and a rotating wheel F45, wherein the rotating wheel E44 is rotatably connected to the side surface of the movable member 43 corresponding to the cam 42 and its outer wheel surface is rollingly connected to the outer wheel surface of the cam 42; the rotating wheel F45 is rotatably connected to the bottom end of the piston rod 41 and rolls on the top surface of the movable member 43.

[0045] like Figure 3 As shown, in some specific embodiments, a slide rail 46 and a slider 47 are further included. The slide rail 46 is arranged along the sliding direction of the movable member 43 and is fixed on the fixed frame 2; the slider 47 slides on the slide rail 46 and is fixed on the movable member 43.

[0046] like Figure 3 As shown, in some specific embodiments, the lifting assembly 4 may further include a return spring 48 , which is arranged along the sliding direction of the movable member 43 and has one end fixed to the fixing frame 2 and the other end fixed to the movable member 43 .

[0047] Specifically, the piston rod 41, the rotating wheel F45, the slide rail 46, the slider 47 and the return spring 48 can be two arranged opposite to each other.

[0048] like Figure 4As shown, in some specific embodiments, the rotating component 5 may also include a plurality of splines 54, the intermittent gear C52 rotates on the fixed frame 2 and the wall of its axial hole is provided with a plurality of spline grooves distributed along the circumferential direction, the plurality of spline grooves are arranged axially of the rotating shaft 51 and pass through the top and bottom ends of the intermittent gear C52; the plurality of splines 54 are fixed on the outer circumferential wall of the rotating shaft 51 at intervals along the circumferential direction and slide in a plurality of sliding grooves respectively, so as to keep the position of the intermittent gear C52 unchanged after the rotating shaft 51 moves upward with the exchange plate 2, thereby maintaining the transmission relationship between the rotating shaft 51 and the intermittent gear C52.

[0049] like Figure 1 , Figure 3 and Figure 4 As shown, in some specific embodiments, the exchange plate 1 may be provided with a wire conduit laying hole 13 , the rotating shaft 51 is a hollow shaft, and the wire conduit laying hole 13 is arranged opposite to the inner hole of the rotating shaft 51 .

[0050] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-station exchange workbench, comprising: An exchange plate (1), wherein a loading platform (6) and a unloading platform (7) are fixed at intervals on the exchange plate (1), characterized in that it also comprises: a fixed frame (2) arranged below the exchange plate (1) and corresponding to the loading platform (6) and the unloading platform (7), a power mechanism (3), a lifting component (4) and a rotating component (5), The power mechanism (3) is fixed on the fixing frame (2) and has an output shaft A and an output shaft B perpendicular to the exchange plate (1); The lifting assembly (4) comprises a piston rod (41), a cam (42) and a moving member (43), wherein the top end of the piston rod (41) is fixed to the bottom surface of the exchange plate (1); the cam (42) is sleeved on the output shaft A; the moving member (43) is placed on the fixed frame (2) and its top surface is an inclined surface which is inclined upward in a direction from away from the cam (42) to close to the cam (42), the inclined surface is in sliding contact with the bottom end of the piston rod (41), and the side surface is in sliding contact with the outer wheel surface of the cam (42), so as to push the moving member (43) to slide back and forth periodically and intermittently, thereby realizing the periodic intermittent lifting and lowering of the exchange plate (1); The rotating assembly (5) comprises a rotating shaft (51), an intermittent gear C (52) and an intermittent gear D (53); the rotating shaft (51) is arranged at an interval with the piston rod (41) and its top end is fixed to the bottom surface of the exchange plate (1); the intermittent gear C (52) is sleeved on the output shaft B; the intermittent gear D (53) is sleeved on the rotating shaft (51) and meshedly connected with the intermittent gear C (52) to push the exchange plate (1) to rotate when the exchange plate (1) is intermittently raised or lowered, thereby realizing periodic intermittent rotation of the exchange plate (1).

2. A double-station exchange workbench according to claim 1, characterized in that: The exchange plate (1) comprises a support plate (11) and a turntable (12); the loading platform (6) and the unloading platform (7) are fixed on the support plate (11) at intervals; the turntable (12) is located between the loading platform (6) and the unloading platform (7) and its top surface is fixed to the bottom surface of the support plate (11); the fixed frame (2), the power mechanism (3), the lifting component (4) and the rotating component (5) are all located below the turntable (12); the top end of the piston rod (41) and the top end of the rotating shaft (51) are fixed to the bottom surface of the turntable (12) at intervals.

3. A double-station exchange workbench according to claim 1, characterized in that: The power mechanism (3) comprises a motor (31) and a dual-output shaft reducer (32); the motor (31) and the dual-output shaft reducer (32) are both fixed on the fixed frame (2), and the output shaft of the motor (31) is drivingly connected to the input shaft of the dual-output shaft reducer (32); the output shaft A and the output shaft B are the two output shafts of the dual-output shaft reducer (32).

4. A double-station exchange workbench according to claim 1, characterized in that: The lifting assembly (4) further comprises a rotating wheel E (44) and a rotating wheel F (45); the rotating wheel E (44) is rotatably connected to the side surface of the movable member (43) corresponding to the cam (42) and its outer wheel surface is rollingly connected to the outer wheel surface of the cam (42); the rotating wheel F (45) is rotatably connected to the bottom end of the piston rod (41) and rolls on the top surface of the movable member (43).

5. A double-station exchange workbench according to claim 4, characterized in that: It also includes a slide rail (46) and a slider (47), wherein the slide rail (46) is arranged along the sliding direction of the movable member (43) and is fixed on the fixed frame (2); and the slider (47) slides on the slide rail (46) and is fixed on the movable member (43).

6. A double-station exchange workbench according to claim 5, characterized in that: The lifting assembly (4) further comprises a return spring (48), which is arranged along the sliding direction of the movable member (43) and has one end fixed on the fixed frame (2) and the other end fixed on the movable member (43).

7. A double-station exchange workbench according to claim 6, characterized in that: The piston rod (41), the rotating wheel F (45), the slide rail (46), the sliding block (47) and the return spring (48) are all arranged in pairs opposite to each other.

8. A double-station exchange workbench according to claim 1, characterized in that: The rotating assembly (5) further comprises a plurality of splines (54); the intermittent gear C (52) rotates on the fixed frame (2) and a plurality of spline grooves distributed along the circumferential direction are provided on the wall of the axial hole of the intermittent gear C (52); the plurality of spline grooves are arranged axially of the rotating shaft (51) and pass through the top and bottom ends of the intermittent gear C (52); the plurality of splines (54) are fixed on the outer circumferential wall of the rotating shaft (51) at intervals along the circumferential direction and slide in the plurality of sliding grooves respectively, so that after the rotating shaft (51) moves upward along with the exchange plate (2), the position of the intermittent gear C (52) is kept unchanged, and the transmission relationship between the rotating shaft (51) and the intermittent gear C (52) is maintained.

9. A double-station exchange workbench according to claim 1, characterized in that: The exchange plate (1) is provided with a wire pipe laying hole (13), the rotating shaft (51) is a hollow shaft, and the wire pipe laying hole (13) is arranged opposite to the inner hole of the rotating shaft (51).

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